#define LED_PIN 13
#define POT_PIN A0

void setup() {
  // put your setup code here, to run once:
  pinMode(LED_PIN, OUTPUT);
  pinMode(POT_PIN, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int potValue = analogRead(POT_PIN);

  digitalWrite(LED_PIN, HIGH);
  delay(potValue);
  digitalWrite(LED_PIN, LOW);
  delay(potValue);
}